This clause of Part 1 or Part 2 is applicable except as follows:
Replacement of the first paragraph by the following text:
This part of IEC 60309 applies to self-contained products that combine within a single
enclosure, a socket-outlet or connector according to IEC 60309-1 or IEC 60309-2 and a
switching device, with a rated operating voltage not exceeding 690 V d.c. or a.c. and 500 Hz ,
and a rated current not exceeding 250 A, primarily intended for industrial use, either indoors
or outdoors.
These products may incorporate an interlock and/or protective devices.